NDLI: Prediction and interpretation of hydraulic permeability for nonwoven fabrics considering hypothetical 2-D layer

Content Provider	Springer Nature Link
Author	Ahn, Seung Jae Lee, Moo Sung Lim, Dae Young Im, Jung Nam Lee, Seung Goo Youk, Ji Ho Jeon, Han Yong
Copyright Year	2013
Abstract	The permeability defined by Darcy’s law indicates the degree of ability that a fluid can flow through nonwoven media under a differential pressure in laminar flow. The permeability generally indicates the specific permeability or absolute permeability. On the other hand, if the fluid is water, the permeability indicates the hydraulic conductivity or permeability coefficient. The permeability is one of the important properties for nonwoven media and a prediction of the permeability acts as a bridge between the manufacturing technology and performance requirements. Because capillary channel theory aims to make the flow of fluid easier and more understandable, many models are based on capillary channel theory. On the other hand, the theory has a limitation in that it is unsuitable for high porosity media. In this study, a very thin downstream layer, which was suggested by Lifshutz [9], was introduced to derive a prediction model of hydraulic permeability. Needle-punched and spunbonded nonwoven fabrics with various basis weights were used in the cross-plain water permeability test. From this ‘thin layer’ model, reasonable agreement between the predicted and experimental results was obtained.
Starting Page	2191
Ending Page	2196
Page Count	6
File Format	PDF
ISSN	12299197
Journal	Fibers and Polymers
Volume Number	14
Issue Number	12
e-ISSN	18750052
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-01-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Permeability model Hydraulic permeability Capillary channel theory Mean flow pore size Kozeny-Carman equation Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering Polymers and Plastics

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